> Please review this patch which adds a "jmodless" jlink mode to the JDK. > Fundamentally this patch adds an option to use `jlink` even though your JDK > install might not come with the packaged modules (directory `jmods`). This is > particularly useful to further reduce the size of a jlinked runtime. After > the removal of the concept of a JRE, a common distribution mechanism is still > the full JDK with all modules and packaged modules. However, packaged modules > can incur an additional size tax. For example in a container scenario it > could be useful to have a base JDK container including all modules, but > without also delivering the packaged modules. This comes at a size advantage > of `~25%`. Such a base JDK container could then be used to `jlink` > application specific runtimes, further reducing the size of the application > runtime image (App + JDK runtime; as a single image *or* separate bundles, > depending on the app being modularized). > > The basic design of this approach is to add a jlink plugin for tracking > non-class and non-resource files of a JDK install. I.e. files which aren't > present in the jimage (`lib/modules`). This enables producing a > `JmodLessArchive` class which has all the info of what constitutes the final > jlinked runtime. > > Basic usage example: > > $ diff -u <(./bin/java --list-modules --limit-modules java.se) > <(../linux-x86_64-server-release/images/jdk/bin/java --list-modules > --limit-modules java.se) > $ diff -u <(./bin/java --list-modules --limit-modules java.se) > <(../linux-x86_64-server-release/images/jdk/bin/java --list-modules > --limit-modules jdk.jlink) > $ ls ../linux-x86_64-server-release/images/jdk/jmods > java.base.jmod java.net.http.jmod java.sql.rowset.jmod > jdk.crypto.ec.jmod jdk.internal.opt.jmod > jdk.jdi.jmod jdk.management.agent.jmod jdk.security.auth.jmod > java.compiler.jmod java.prefs.jmod java.transaction.xa.jmod > jdk.dynalink.jmod jdk.internal.vm.ci.jmod > jdk.jdwp.agent.jmod jdk.management.jfr.jmod jdk.security.jgss.jmod > java.datatransfer.jmod java.rmi.jmod java.xml.crypto.jmod > jdk.editpad.jmod jdk.internal.vm.compiler.jmod > jdk.jfr.jmod jdk.management.jmod jdk.unsupported.desktop.jmod > java.desktop.jmod java.scripting.jmod java.xml.jmod > jdk.hotspot.agent.jmod jdk.internal.vm.compiler.management.jmod > jdk.jlink.jmod jdk.naming.dns.jmod jdk.unsupported...
Severin Gehwolf has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 16 additional commits since the last revision: - Merge branch 'master' into jdk-8311302-jmodless-link - Add a message when a run-image based link is being performed - Add hint to the modified file case - AddJmodResourcesPlugin => AddRunImageResourcesPlugin rename - --add-jmod-resources => --add-run-image-resources rename Also rename jmod_resources to runimage_resources - Improve error message of run-image recursive link - Use a single option --unlock-run-image for single hop and warnings - JmodLessArchive => RunImageArchive rename - Merge branch 'master' into jdk-8311302-jmodless-link - Work-around JDK-8317609 (jdk.jcmd module doesn't verify) - ... and 6 more: https://git.openjdk.org/jdk/compare/a23907ec...fea34e3a ------------- Changes: - all: https://git.openjdk.org/jdk/pull/14787/files - new: https://git.openjdk.org/jdk/pull/14787/files/b82efb08..fea34e3a Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=14787&range=06 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14787&range=05-06 Stats: 73397 lines in 2188 files changed: 36664 ins; 18945 del; 17788 mod Patch: https://git.openjdk.org/jdk/pull/14787.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14787/head:pull/14787 PR: https://git.openjdk.org/jdk/pull/14787
